Question

Name a state where:
I. Tube wells are common.
II.Tank irrigation is popular.

Answer 1

Hint: To acquire subsoil water for various purposes, wells are dug in the ground with a depth ranging from 3 metres up to 15 metres. Tanks are usually water bodies constructed and managed by the villagers that hold enough water to irrigate over the agricultural land.

Complete Step by Step Answer: Tube wells and tanks are important sources of acquiring water day to day usage. Water obtained from these sources is required for various purposes such as for agricultural purposes, household, drinking, bathing etc.

Punjab is a state where tube wells are common. Tube wells are constructed in areas where there is an abundant supply of groundwater. The state of Punjab requires ample water for rice cultivation, in addition, the groundwater is also used for drinking and domestic purposes. People of Punjab mostly depend on groundwater resources obtained through motor-operated tube wells. Farmers also prefer the motor-operated tube well as it is easier to pump and irrigate the paddy fields. Nobody uses the canal water to irrigate their fields.

Karnataka is a state where tank irrigation is popular. Mud banks are constructed across a small stream to collect excess water during the rainy season into a small reservoir. This practice of collecting water into a small reservoir or tank for irrigation purposes is referred to as tank irrigation. Water impounded through bund is used for irrigation and other purposes. The arid regions of central and western India including southern India have seasonal rivers which reduce the scope of canal irrigation as well as the scope for wells due to the presence of gneisses and hard granite underground. So, because of all these people of this region depend on tank irrigation.

Note: There are certain disadvantages of both tube well and tank irrigation. Tube wells become useless when excess water is taken out resulting in the drying up of wells. The agricultural area will no longer be suitable once the groundwater reserve gets exhausted. As far as tank irrigation is concerned regular desilting of tanks is required as tanks usually get silted up. In cases of low rainfall, tanks become useless as they remain dry without abundant rainfall.